Mauna Kea – the world’s tallest mountain

At 10,000m from its oceanic base to the peak, Mauna Kea is the world’s tallest mountain. It provides an arduous high-altitude hike over barren volcanic terrain, where the numbers look straightforward but the lack of oxygen adds a considerable challenge. There’s a high chance of experiencing snow in Hawai’i (and an altitude headache!)

Haleakalā from Paia – sea to 3,055m

An epic ride on the longest continuous paved climb in the world. Taking in a shade over 3,000m of climbing with ~56km on the way up, and another 56km coming back.